It took me 20 years to finally notice a HUGE problem with Tanner's house.

If you look it outside, it look a normal San Franciscan house. But the layout is way off.

First: Garage - it's on street level, looks almost okay. Second staircase (next to that one what leads to kitchen) is way off because it's lead to back yard and back yard is also ON street level.

Second: First floor - looks also okay until you reach to back yard through kitchen. If garage is in street level, that should mean that back yard should be ABOVE street level.

Third: Second floor - layout looks okay until you notice the staircase in the kitchen in first floor. As DJ's/ Stephanie's later Stephanie's/ Michelle's is on top of the kitchen that should mean that the staircase down to the kitchen should be next to girls bedroom wher bathroom or staircase to the attic locate.

WHY writers never do the research when they model the set-house from the actual house?

Alot of TV houses have problems where the interior doesn't "match" the exterior. Like the Brady Bunch house. It is clear from the exterior that it is a one- story house, yet they had a second floor and an attic.